initial commit for new feature #1077

allow to limit the number of concurrent tcp connection to a downstream service

src/Ocelot/Configuration/Creator/HttpHandlerOptionsCreator.cs

@@ -19,7 +19,7 @@
             var useTracing = _tracer != null && options.UseTracing;
 
             return new HttpHandlerOptions(options.AllowAutoRedirect,
-                options.UseCookieContainer, useTracing, options.UseProxy);
+                options.UseCookieContainer, useTracing, options.UseProxy, options.MaxConnectionsPerServer);
         }
     }
 }

src/Ocelot/Configuration/File/FileHttpHandlerOptions.cs

@@ -6,7 +6,8 @@
         {
             AllowAutoRedirect = false;
             UseCookieContainer = false;
-            UseProxy = true;
+            UseProxy = true;
+            MaxConnectionsPerServer = int.MaxValue;
         }
 
         public bool AllowAutoRedirect { get; set; }
@@ -15,6 +16,8 @@
 
         public bool UseTracing { get; set; }
 
-        public bool UseProxy { get; set; }
+        public bool UseProxy { get; set; }
+
+        public int MaxConnectionsPerServer { get; set; }
     }
 }

src/Ocelot/Configuration/HttpHandlerOptions.cs

@@ -6,32 +6,44 @@
     /// </summary>
     public class HttpHandlerOptions
     {
-        public HttpHandlerOptions(bool allowAutoRedirect, bool useCookieContainer, bool useTracing, bool useProxy)
-        {
-            AllowAutoRedirect = allowAutoRedirect;
-            UseCookieContainer = useCookieContainer;
-            UseTracing = useTracing;
-            UseProxy = useProxy;
+        public HttpHandlerOptions(bool allowAutoRedirect, bool useCookieContainer, bool useTracing, bool useProxy, int maxConnectionsPerServer)
+        {
+            AllowAutoRedirect = allowAutoRedirect;
+            UseCookieContainer = useCookieContainer;
+            UseTracing = useTracing;
+            UseProxy = useProxy;
+            MaxConnectionsPerServer = maxConnectionsPerServer;
         }
 
+
         /// <summary>
         /// Specify if auto redirect is enabled
-        /// </summary>
-        public bool AllowAutoRedirect { get; private set; }
-
+        /// </summary>
+        /// <value>AllowAutoRedirect</value>
+        public bool AllowAutoRedirect { get; private set; }
+
         /// <summary>
         /// Specify is handler has to use a cookie container
-        /// </summary>
+        /// </summary>
+        /// <value>UseCookieContainer</value>
         public bool UseCookieContainer { get; private set; }
 
         /// <summary>
         /// Specify is handler has to use a opentracing
-        /// </summary>
+        /// </summary>
+        /// <value>UseTracing</value>
         public bool UseTracing { get; private set; }
 
         /// <summary>
         /// Specify if handler has to use a proxy
-        /// </summary>
-        public bool UseProxy { get; private set; }
+        /// </summary>
+        /// <value>UseProxy</value>
+        public bool UseProxy { get; private set; }
+
+        /// <summary>
+        /// Specify the maximum of concurrent connection to a network endpoint
+        /// </summary>
+        /// <value>MaxConnectionsPerServer</value>
+        public int MaxConnectionsPerServer { get; private set; }
     }
 }

src/Ocelot/Configuration/HttpHandlerOptionsBuilder.cs

@@ -6,6 +6,7 @@
         private bool _useCookieContainer;
         private bool _useTracing;
         private bool _useProxy;
+        private int _maxConnectionPerServer;
 
         public HttpHandlerOptionsBuilder WithAllowAutoRedirect(bool input)
         {
@@ -30,10 +31,16 @@
             _useProxy = useProxy;
             return this;
         }
+        public HttpHandlerOptionsBuilder WithUseMaxConnectionPerServer(int maxConnectionPerServer)
+        {
+            _maxConnectionPerServer = maxConnectionPerServer;
+            return this;
+        }
+
 
         public HttpHandlerOptions Build()
         {
-            return new HttpHandlerOptions(_allowAutoRedirect, _useCookieContainer, _useTracing, _useProxy);
+            return new HttpHandlerOptions(_allowAutoRedirect, _useCookieContainer, _useTracing, _useProxy, _maxConnectionPerServer);
         }
     }
 }

src/Ocelot/Requester/HttpClientBuilder.cs

@@ -90,7 +90,9 @@ namespace Ocelot.Requester
             {
                 AllowAutoRedirect = context.DownstreamReRoute.HttpHandlerOptions.AllowAutoRedirect,
                 UseCookies = context.DownstreamReRoute.HttpHandlerOptions.UseCookieContainer,
-                UseProxy = context.DownstreamReRoute.HttpHandlerOptions.UseProxy
+                UseProxy = context.DownstreamReRoute.HttpHandlerOptions.UseProxy,
+                MaxConnectionsPerServer = context.DownstreamReRoute.HttpHandlerOptions.MaxConnectionsPerServer
+
             };
         }
 
@@ -101,6 +103,7 @@ namespace Ocelot.Requester
                 AllowAutoRedirect = context.DownstreamReRoute.HttpHandlerOptions.AllowAutoRedirect,
                 UseCookies = context.DownstreamReRoute.HttpHandlerOptions.UseCookieContainer,
                 UseProxy = context.DownstreamReRoute.HttpHandlerOptions.UseProxy,
+                MaxConnectionsPerServer = context.DownstreamReRoute.HttpHandlerOptions.MaxConnectionsPerServer,
                 CookieContainer = new CookieContainer()
             };
         }